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/* IEEE floating point support declarations, for GDB, the GNU Debugger.
Copyright (C) 1991 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#if !defined (IEEE_FLOAT_H)
#define IEEE_FLOAT_H 1
#include "ansidecl.h"
/* Parameters for extended float format: */
struct ext_format {
unsigned totalsize; /* Total size of extended number */
unsigned signbyte; /* Byte number of sign bit */
unsigned char signmask; /* Mask for sign bit */
unsigned expbyte_h; /* High byte of exponent */
unsigned expbyte_l; /* Low byte of exponent */
unsigned manbyte_h; /* High byte of mantissa */
unsigned manbyte_l; /* Low byte of mantissa */
};
#define TOTALSIZE ext_format->totalsize
#define SIGNBYTE ext_format->signbyte
#define SIGNMASK ext_format->signmask
#define EXPBYTE_H ext_format->expbyte_h
#define EXPBYTE_L ext_format->expbyte_l
#define MANBYTE_H ext_format->manbyte_h
#define MANBYTE_L ext_format->manbyte_l
/* Actual ext_format structs for various machines are in the *-tdep.c file
for each machine. */
#define EXT_EXP_NAN 0x7FFF /* Exponent value that indicates NaN */
#define EXT_EXP_BIAS 0x3FFF /* Amount added to "true" exponent for ext */
#define DBL_EXP_BIAS 0x3FF /* Ditto, for doubles */
/* Convert an IEEE extended float to a double.
FROM is the address of the extended float.
Store the double in *TO. */
extern void
ieee_extended_to_double PARAMS ((const struct ext_format *, char *, double *));
/* The converse: convert the double *FROM to an extended float
and store where TO points. */
extern void
double_to_ieee_extended PARAMS ((const struct ext_format *, double *, char *));
#endif /* defined (IEEE_FLOAT_H) */
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